Improved heating and cooling-coil for mash-tubs



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vLetters Patent No. 89,37 4, dated April 27, 1869.

IMPVIRO'VED HEATING AND COOLING-COIL FOR MASH-T'U'BS.

To all 'whom it'mag/ concern:

lBe it known that 1, MARSHALL J. ALLEN, of New York, in the county of New York, and State of New York, have invented new and improved Heating and .Cooling-Coils for Mash-Tubs; and I do hereby declare 'that the following is a "full, clear, and exact description thereof', which will enable others skilled in the artto make and use the same, reference being had to the ac 'in s uch a manner that the teeth of a revolving rakehead may pass between them, as will be hereinafter more fully described.

Un reference to the accompanying drawings- Figure 1 represents a sectional elevation of my improvement.

Figure 2 is a plan view of the same'. Figure 3 is a detail, showing the manner of arranging the pipes.

Similar letters of reference indicate corresponding Parts, A l

A represents the curb of the tub, and B, the bottom. O represents the coil.

v .a represents the steam-supply pipe, which -is conducted under the bottom of the tub, and turned npward through it at al, and provided with a suitable packing-joint. From the upper side, at a2, it is conyeyed around the tub to the .point a?, where it is passed downthrough the bottom, and up again at a, tiom whence it is conveyed back, around to the point a5, forming the second coil; thence, down through the bottom, and up again, as before,`and continuing on, in this manner, until the whole bottom is sufficiently covered, and terminating in the discharge-pipe, at a.

Through this coil the steam is circulated, under sufiicient pressure to heat the mash until the same is ac coniplished, when the steam-is shut off, and a coldwater pipe, a7, also communicating with the coil, through the pipea, is opened, and the cold water a1- -lowed to ilow through in the sam'e manner, for cooling the mash. Each connecting-joint of the coils un' der the floor may be 'provided vwith water-cocks, to draw off the water, to prevent freezing.

the teeth of the rake or comb are permitted to 'work snugly between the coils, and close to the door, whereby the whole mass is thoroughly stirred.

That portion of the pipe under or not inside of the tub may be of iron, o r any other suitable metal; but it is requisite that the port-ion exposed to the mash be made of copper or brass', or other similar metal.

By means of the coil arranged in, as herein specified, I am euabledto scald the mash, and cool it down again, in little I'nore than half the time usually employed, as I have demonstrated by actual experiment.

Having thus described my invention,

Patent- The concentric rings O C, formed in the manner described, by means of the pipe a-l passing successively through the bottom B of the tub, a water-cock being provided at each bend o1' joint thereof, all arranged so that the ends of the teeth t of the rake-head D may work between them for the purpose indicated.

M. J. ALLEN. Witnesses:

FRANK BLOGKLEY, E. GREENE OoLLINs.

It will be seen, that bythis arrangement of the coil,

I claim as new, and'desire to secure by Letters 

